symptoms of pregnancy, pms, or side effects of birth control pills?

It's my first time taking Levonorgestrel - Ethinyl Estradiol birth control pills (or any type of birth control to be honest) and I just want to know if anyone else shared the same experience as I did or if anyone has some advice to share. PLEASE.

I started taking the pills on the first day of my period then my boyfriend and I had sex the week after. On the 2nd week (which was the week after I had sex), I had sore breasts then on the 3rd week, I had SEVERE cramps and bloating. On top of that, I also had requiring headaches and fatigue. This has taken a MASSIVE toll on my mental health. I feel so anxious and depressed all the time not knowing if I'm pregnant or not or if this is just the side effects of the birth control.

I finished the 21 active pills 2 days ago and I STILL haven't had my period yet. I still feel all the symptoms I've mentioned except that my breasts aren't as sore anymore and I've also noticed some slight white/yellow-ish sticky discharge.

Can anyone tell me if these are symptoms of pregnancy, pms, or the birth control's side effects?